28
Multi F Ceiling Cassette Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
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MAX
MULTI
F
MULTI
F
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Table 15: Indoor Unit Pipe Sizes.
Table 16: Indoor Unit Piping Connections.
Table 17: Connection Socket Dimensions.
Outdoor Unit to Indoor Unit Connections
INSTALLATION
Installing Field Piping to the Branch Distribution Unit Piping Connections
1. Remove any caps, etc., that will be on the branch distribution unit.
2. Tighten each piping connection individually following the “Tightening the Flare Nuts” procedure earlier in this section.
3. When all piping installation has been completed, perform the triple leak / pressure and evacuation tests (see the Final Installation Proce-
dures Section in the Multi F / Multi F MAX or Multi F / Multi F MAX LGRED Outdoor Unit Installation Manual), verify that the system does
not have any leaks, and then fully insulate all joints / connections.
Using the Connection Socket
Some indoor units require the use of a connection socket when piping the indoor units
to the branch distribution unit. (See previous page and below for information.) The
connection sockets are included as a factory-supplied accessory with the indoor units,
or in the case of the 36k indoor unit, it is factory supplied with the branch distribution
units. To install:
1. Remove any caps, etc., that will be on the branch distribution unit.
2. Align the center of the piping sections as seen in the diagram at right.
3. Tighten each piping connection individually following the “Tightening the Flare Nuts” procedure earlier in this section.
4. When all piping installation has been completed, perform the triple leak / pressure and evacuation tests (see the Final Installation Procedures
Section in the Multi F / Multi F MAX or Multi F / Multi F MAX LGRED Outdoor Unit Installation Manual), verify that the system does not have
any leaks, and then fully insulate all joints / connections.
Figure 30: Connection Socket Diagram, External View.
Connection Socket
To Branch
Distribution
Connection
To Flared
End of
Field Piping
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Indoor Unit Capacity
Vapor Line
Piping Size (in., OD)
Liquid Line
Piping Size (in., OD)
7,000 Btu/h
Ø3/8
Ø1/4
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
15,000 Btu/h: Console;
18,000 Btu/h
Ø1/2
24,000 Btu/h
36,000 Btu/h
Ø5/8
Ø3/8
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Indoor Unit Capacity
Vapor Line
Conn. (in., OD)
Liquid Line
Conn. (in., OD)
7,000 Btu/h
Ø3/8
Ø1/4
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
18,000 Btu/h: Wall-Mounted
Ø5/8
Ø3/8
15,000 Btu/h: Console;
18,000 Btu/h: Low Static Duct,
Four-Way Cassette, VAHU
Ø1/2
Ø1/4
24,000 Btu/h
Ø1/2
Ø1/4
36,000 Btu/h
Ø5/8
Ø3/8
Indoor Unit Capacity
Vapor (in., OD)
Liquid (in., OD)
A
B
A
B
18,000 Btu/h: Wall-Mounted
ĺĺ
ĺ
15,000 Btu/h: Console;
18,000 Btu/h: Low Static Duct, Four-Way Cassette,
VAHU
ĺ
N/A
24,000 Btu/h*
ĺ
N/A
36,000 Btu/h
ĺ
ĺ